What is PFC and DFC?
Policy Feature Card (PFC) Distributed Forwarding Card (DFC) Centralized Forwarding Card (CFC)
What is Cisco PFC?
Priority flow control (PFC; IEEE 802.1bb), which is also referred to as Class-based Flow Control (CBFC) or Per Priority Pause (PPP), is a mechanism that prevents frame loss that is due to congestion. PFC is similar to 802.3x Flow Control (pause frames) or link-level flow control (LFC).
What is WS F6700 CFC?
WS-F6700-CFC Cisco Catalyst 6500 Central Forwarding Card.
Does WS X6748 GE TX support PoE?
Product Description. The Cisco Catalyst X6748-GE-TX PoE module provides intelligent power management such that it negotiates power requirements with Cisco powered devices using Cisco Discovery Protocol.
What is DFC line card?
Distributed Forwarding Card (DFC) DFCs are located in linecards, not in Supervisors. A DFC is used to hold a local copy of the forwarding tables (constructed by the MSFC) along with Security and QoS policies to facilitate local switching on the linecard.
What is PFC QoS?
The term “PFC QoS” refers to hardware accelerated QoS. PFC QoS is implemented on various switch components in addition to the PFC and any DFCs. Note. • For complete syntax and usage information for the commands used in this chapter, see these.
How does priority flow control work?
Priority Based Flow Control (PFC) provides an enhancement to the existing pause flow control mechanism as described in 802.1x. When working with lossless traffic, the receiving side sends a pause frame (Xoff) to the transmitting side before the buffer is filled.
What is CFC in networking?
CFC is a centralized forwarding card for the switching modules which makes IPv4 Routing over the PFC.
What is a DSCP value?
Device Configuration : Protect : DSCP Value. DSCP Value. DiffServ Code Point (DSCP) uses the 6 bits, thereby giving 2^6 = 64 different values (0 to 63). describes the standard DSCP values. Remaining DSCP values can be customized as per the QoS requirement.
What is flow control RX and TX?
RX and TX Enabled: The adapter generates and responds to flow control frames. RX Enabled: The adapter pauses transmission when it receives a flow control frame from a link partner. TX Enabled: The adapter generates a flow control frame when its receive queue reaches a predefined limit.
What is purpose of flow control?
Usually, flow control is used to prevent the overflow of buffering resources when transmitting information. When the queue at the receiver gets full then the flow control must stop the transmission of information at the sender. Once there is room at the queue the flow control resumes the transmission of information.
What is DSCP and ECN?
The modern redefinition of the ToS field, also used for the Traffic Class field in IPv6 packets, is an 8-bit differentiated services field (DS field) which consists of a 6-bit Differentiated Services Code Point (DSCP) field and a 2-bit Explicit Congestion Notification (ECN) field.